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Rooting of forest species mini-cuttings: an application of non-parametric survival analysis

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Abstract

The adventitious rooting of mini-cuttings with less time spent in the greenhouse is a desired step in plant production in forestry companies. This can minimize costs due to the better use of the facilities, avoiding the permanence of plants beyond the necessary time or the death of mini-cuttings due to the removal of the greenhouse before the rhizogenic process is completed. The objective of this work was to evaluate the survival analysis techniques in the mini-cutting rooting of forest species and determine the optimal time of the greenhouse. The experimental design used was completely randomized in a split-plot scheme. The plots consisted of the species, Cariniana estrellensis, Cariniana legalis, Cordia alliodora, and Cordia trichotoma, and the subplots corresponded to the substrates: organic pine bark compost—OPBC, carbonized rice husk—CRH, and fine Vermiculite—FV. The survival and hazard functions of mini-cutting rooting, the Kaplan–Meier estimator, the Log-Rank, and Wilcoxon tests were estimated. It is concluded that the survival analysis techniques effectively discriminate the rooting of species in different substrates over time in the greenhouse. The optimum time in the greenhouse, the point on the curve at which rooting becomes constant, in this study, was 40, 49, and 49 days for Cordia alliodora; 47, 46, and 49 for Cariniana legalis; 47, 48, and 47 for Cariniana estrellensis and 51, 50, and 47 for Cordia trichotoma, in substrates S1-100% OPBC, S2—33% OPBC + 33.5% CRH + 33.5% FV and S3—50% CRH + 50% FV, respectively.

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Acknowledgements

The authors express their sincere thanks to the Research Support Foundation of the State of Minas Gerais (FAPEMIG) and National Council for Scientific and Technological Development (CNPq) for the financial support and the reviewers and editors for their suggestions.

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MLD: Conceptualization, Methodology, Formal analysis, Data Curation, Visualization, Writing—original draft. SMF: Conceptualization, Methodology, Formal analysis, Writing—original draft. AFF: Investigation, Resources, Writing—review & editing. AX: Investigation, Supervision, Writing—review & editing. All authors read and approved the final manuscript.

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Correspondence to Marciel Lelis Duarte.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Duarte, M.L., Martins Filho, S., de Freitas, A.F. et al. Rooting of forest species mini-cuttings: an application of non-parametric survival analysis. New Forests 54, 1153–1167 (2023). https://doi.org/10.1007/s11056-023-09962-0

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  • DOI: https://doi.org/10.1007/s11056-023-09962-0

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